Pencil sharpener



FIG. 1 is a perspective view of a pencil sharpener showing my new design;

FIG. 2 is a reduced scale right side elevational view, the left side being a mirror image thereof;

FIG. 3 is an inverted rear elevational view; and

FIG. 4 is a bottom plan view.

The characteristic feature of the design resides in the longitudinal grooves on the two opposite and identical sides. 

The ornamental design for a pencil sharpener, as shown and described. 